Bump org.apache.zookeeper:zookeeper from 3.4.14 to 3.7.2 #137

Job	Run time
R 4.0.1 on windows-latest with Java 8	6m 40s
R 4.0.1 on windows-latest with Java 11	6m 7s
R release on windows-latest with Java 8	3m 58s
R release on windows-latest with Java 11	3m 13s
R 4.0.1 on macOS-latest with Java 8	3m 10s
R 4.0.1 on macOS-latest with Java 11	2m 56s
R release on macOS-latest with Java 8	2m 22s
R release on macOS-latest with Java 11	3m 13s
R 4.0.1 on ubuntu-18.04 with Java 8	1s
R 4.0.1 on ubuntu-18.04 with Java 11	1s
R release on ubuntu-18.04 with Java 8	1s
R release on ubuntu-18.04 with Java 11	1s
	31m 43s

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